[AryanRG]

Summary

avg(@) can return infinity for finite inputs when their sum overflows even though the average is representable. For example:

import jmespath

assert jmespath.search("avg(@)", [1e308, 1e308]) == 1e308

The current result is inf. This change uses an overflow-safe fallback for that case while preserving the existing calculation for ordinary inputs. Regression tests cover large positive and negative values, cancellation, and controls.

Validation

• New regression on the base: 1 failed, 6 controls passed.
• Patched full suite: 993 passed, 1 skipped on both Python 3.9.6 and 3.14.4.
• Lint and git diff --check: passed.

The full suite was not run on other Python versions or platforms; hosted CI remains to be checked.

AI assistance was used to prepare the implementation and regression tests.